D IVIDING F RACTIONS AND Cross Reducing. B ASIC F RACTIONS R EVIEW : Change a whole # to a fraction  Write a 1 underneath Change a fraction to a whole.

Slides:

Advertisements

Similar presentations

Multiplying and Dividing Rational Numbers

Advertisements

Multiplying and Dividing Rational Numbers

D IVIDING F RACTIONS. W ARM - UP How can you write ( ) in distributive form? How can you write ( ) in distributive form? 12(7 + 4) 16(4 +

Multiplying Fractions with Whole Numbers Example: 3/8 of 40 “of” = multiply Method #1: Picture Method #2: Put the whole number over 1 and then simplify.

Solving Percent Problems Using Proportions

Multiplying & Dividing Rational Expressions. Simplified form of a rational expression - Means the numerator and denominator have NO common factors. To.

Lesson 26. Mixed Number: A whole number and a fraction together 5 ½ 12 ¼.

Solving 2-step Equations. Inverse Operations Pairs AdditionSubtraction MultiplicationDivision ExponentsRadicals.

Properties of Multiplication The properties for multiplying whole numbers are also true for multiplying fractions and whole numbers. (only 1 new property)

MULTIPLY and DIVIDE RATIONAL NUMBERS. MULTPILYING MIXED NUMBERS 1)Change all Mixed numbers to improper fractions 2)Simplify A) Up and Down B) Diagonally.

4. Check that the answer is reduced: The numerator and denominator should not have any common factors besides 1. When the GCF of the numerator and denominator.

Bell Work!!! a ÷ (b) 2. c × d 3. d ÷ d 4. c × b

Fraction Division Opposite of Multiplication. The opposite number: Invert Called the reciprocal You simply flipped your fraction.

Dividing fractions 4/5 ÷ 7/8 = ?. When you are dividing fractions, invert the divisor. In other words, flip the right fraction. 4/5 ÷ 7/8 8/7= ?

We have: And we take half of it! 1 REVIEW: Multiply Fractions with Models 1.What is one-half of one-third? MORE PRACTICE:

EXAMPLE 1 Dividing a Fraction by a Fraction a = = 3 4 1, or b. – – = = 7 (– 2) 9 – 4 = 1 4 – 2, or.

Watch “Powers of 10” csu/powersof10/

F RACTIONS N.S DO NOW (3 MINS ) PKB (P RIOR K NOWLEDGE B OX ) Topic: FractionsMisconceptions Complete this side only. List anything that you know.

Multiplying and dividing fractions review. ⅔ ¹⁵/₁₆ If your fractions are proper, then you can cross cancel That means you are reducing early.

How to multiply a whole number by a fraction.

Dividing with Fractions. Vocabulary Reciprocals – number pairs that have a product of 1. Here are a few: 3 x 5 = x 1 = ⅟₂ x ⅖.

Dividing Fractions and Mixed Numbers

Multiplying and Dividing Rational Numbers. The term Rational Numbers refers to any number that can be written as a fraction. This includes fractions that.

Changed division sign to multiplication sign When Dividing Fractions, always remember to: FLIP SWITCH MULTIPLY Since both 10 and 12 are divisible by 2,

Purpose: To divide fractions. Homework: P. 256 – – 43 odd.

Notice anything interesting?

D IVIDING F RACTIONS Lesson 25. B ASIC F RACTIONS R EVIEW : *Change a whole # to a fraction  Write a 1 underneath *Reciprocals  A flipped fraction (based.

Multiplying and Dividing of Fractions. How to Find a Fraction of a Fraction The first thing to remember is “of” means multiply in mathematics. of = x.

1. Flip over 2nd fraction (reciprocal) 2. keep 1st fraction the same 3. change ÷ to an X 4. multiply 5. reduce.

M ULTIPLYING & D IVIDING RATIONAL EXPRESSIONS Section 5.2.

Dividing Mixed Numbers Lesson 26. **Everything must be a FRACTION before multiplying!!! CHANGE (to fraction form) REWRITE (problem with fractions) CROSS.

Multiplying AND DIVIDING RATIONAL EXPRESSIONS. Review: Multiplying fractions.

Dividing with Fractions. Models If one and ¾ pizzas are cut into ¼ sections, how many people will receive a share? 1 whole ¾ Since there are 7 equal quarters,

. ReciprocalReciprocal. Multiplying FractionsMultiplying Fractions. Dividing FractionsDividing Fractions QUIZ: Multiplying Fractions QUIZ: Dividing Fractions.

Dividing Fractions.

Solving Equations Containing Fractions. Vocabulary The reciprocal of a fraction: changes the places of the numerator and denominator. (Flip the fraction.

Algebra Readiness Chapter 2 Section Finding Reciprocals Two nonzero numbers whose product is 1, such as 2/9 and 9/2, are reciprocals. Every number.

5.4 Dividing Fractions and Mixed Numbers

N UMBER T HEORY AND F RACTIONS R EVIEW. N UMBER T HEORY Prime Number- A whole number that can only be divided by 1 and itself Ex. 2,3,5,7,11,13… Composite.

 Anything to the power of zero is one  4 0 =1  X 0 =1  =?

3 3 x =5 When you see a Multiplication problem, you can use the DIVISION Property of Equality to solve it! Remember – a FRACTION means to divide! CHECK.

Multiplying Fractions with Models Notes. I can: multiplying fraction to solve problems ½ x ¾ =3/8 Paste the model in your notebook. Mark your fraction.

Chapter 3, Lesson 3D Pages

Operations on Rational algebraic expression

3-4 Multiplying and 3-5Dividing Rational Numbers

Multiplying and Dividing Rational Numbers

Dividing Fractions.

Multiplying and Dividing Fractions

Fractions in Algebraic Equations

Dividing Positive and Negative Fractions

get all crazy with this “friend”

Multiplying and Dividing Rational Numbers

Multiplying and Dividing Rational Numbers

Dividing a Fraction by a Fraction

Multiplying and Dividing Rational Numbers

Add and Subtract Mixed Numbers

Dividing Fraction and Whole number

Dividing Fractions and Mixed Numbers Guided Notes

 = We’re two little fractions to divide.

DIVIDE FRACTIONS AND MIXED NUMBERS

Watch “Powers of 10”

The Percent Proportion

Solve the following equations.

Multiplying and Dividing Rational Numbers

In this lesson you are going to learn to how to place a fraction with the numerators other than one on a number line by breaking the whole number one on.

Aim: How do we divide fractions?

Dividing Fraction Mr. Hickey.

Multiplying and Dividing Rational Numbers

Dividing Fractions.

Multiplying and Dividng Fractions

Presentation transcript:

D IVIDING F RACTIONS AND Cross Reducing

B ASIC F RACTIONS R EVIEW : *Change a whole # to a fraction  Write a 1 underneath *Change a fraction to a whole #  Drop the 1 or divide *Cross Reducing  -same #s, make both 1 - leave diagonal pair with “1” alone - see if diagonal pair can be reduced by smaller # 5 = 5 18 = = 1 12 =

R EVIEW OF D IVIDING F RACTIONS Steps: 1) KEEP [the first fraction the same] 2) CHANGE [the “ ÷ ” to “x”] 3) FLIP [the second fraction to its reciprocal] **CROSS REDUCE [before solving] 3 ÷ x x

E XAMPLES 6 ÷ x x ÷ x x

D IVIDING FRACTIONS - P RACTICE Remember – Everything MUST be in fraction form! Keep Change Flip CROSS REDUCE a) 3 ÷ b) 5 ÷ 5 7 c) 5 ÷ 2 6 3